}

    /** Performs a GAS operation on the {@link #waiters} field. */
    @Override
    Waiter gasWaiters(AbstractFuture<?> future, Waiter update) {
      while (true) {
        Waiter waiter = future.waiters;
        if (update == waiter) {
          return waiter;
        }
        if (casWaiters(future, waiter, update)) {
          return waiter;
        }
      }
    }

    /** Non-volatile write of the thread to the {@link Waiter#thread} field. */
    abstract void putThread(Waiter waiter, Thread newValue);

    /** Non-volatile write of the waiter to the {@link Waiter#next} field. */
    abstract void putNext(Waiter waiter, @CheckForNull Waiter newValue);

    /** Performs a CAS operation on the {@link #waiters} field. */
    abstract boolean casWaiters(

  // TODO: Test interrupts with both interruptible and uninterruptible monitor.
  // TODO: Test multiple waiters: If guard is still satisfied, signal next waiter.
  // TODO: Test multiple waiters: If guard is no longer satisfied, do not signal next waiter.

  // TODO: Test interrupts with both interruptible and uninterruptible monitor.
  // TODO: Test multiple waiters: If guard is still satisfied, signal next waiter.
  // TODO: Test multiple waiters: If guard is no longer satisfied, do not signal next waiter.

# Futures.getChecked, in both of its variants, is incompatible with proguard.

# Used by AtomicReferenceFieldUpdater and sun.misc.Unsafe
-keepclassmembers class com.google.common.util.concurrent.AbstractFuture** {
  *** waiters;
  *** value;
  *** listeners;
  *** thread;
  *** next;
}
-keepclassmembers class com.google.common.util.concurrent.AtomicDouble {
  *** value;
}

	if !evaluator.Handles(a) {
		return nil
	}
	waiter := newAdmissionWaiter(a)

	e.addWork(waiter)

	// wait for completion or timeout
	select {
	case <-waiter.finished:
	case <-time.After(10 * time.Second):
		return apierrors.NewInternalError(fmt.Errorf("resource quota evaluation timed out"))
	}

	return waiter.result
}

func (e *quotaEvaluator) addWork(a *admissionWaiter) {

    int waiters = guard.waiterCount++;
    if (waiters == 0) {
      // push guard onto activeGuards
      guard.next = activeGuards;
      activeGuards = guard;
    }
  }

  /** Records that the current thread is no longer waiting on the specified guard. */
  @GuardedBy("lock")
  private void endWaitingFor(Guard guard) {
    int waiters = --guard.waiterCount;

    int waiters = guard.waiterCount++;
    if (waiters == 0) {
      // push guard onto activeGuards
      guard.next = activeGuards;
      activeGuards = guard;
    }
  }

  /** Records that the current thread is no longer waiting on the specified guard. */
  @GuardedBy("lock")
  private void endWaitingFor(Guard guard) {
    int waiters = --guard.waiterCount;

		return requestsSent == wantRequestsSent
	}); err != nil {
		t.Fatalf("Failed to wait progress requests, err: %s, want: %d , got %d", err, wantRequestsSent, requestsSent)
	}

	logger.Info("Adding waiters allows progress request to be sent")
	pr.Add()
	wantRequestsSent++
	if err := pollConditionNoChange(pollPeriod, minimalNoChange, pollTimeout, func() bool {
		requestsSent = pr.progressRequestsSentCount.Load()

		//
		// * Readers of the result will wait on the monitor until the first result
		//   has been saved.
		// * The sync loop (i.e. the only writer), will signal all waiters every
		//   time it updates the result.
		nodeAddressesMonitor: sync.NewCond(&sync.Mutex{}),
	}
}

// NodeAddresses waits for the first sync loop to run. If no successful syncs
// have run, it will return the most recent error. If node addresses have been